<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 进度条  此处active接受的number类型-->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- Tabs导航区 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabsleave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                checkStrictly
                clearable
                :props="cateProps"
                v-model="addForm.goods_cat"
                :options="cateList"
                expandTrigger="hover"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="item2"
                  v-for="(item2, index2) in item.attr_vals"
                  :key="index2"
                  border
                >
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers='headersObj'
              :on-success='headeSuccess'
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"
               >
              </quill-editor>
              <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
    title="图片预览"
    :visible.sync="previewVisible"
    width="50%">
    <img :src="previewPath" alt="">
    </el-dialog>
  </div>
</template>

<script>
//导入lodash
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: "0",
      //添加商品的数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片数组
        pics:[],
        //商品详情描述
        goods_introduce:'',
        attrs:[],

      },
      //级联选择器双向绑定数组
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      //商品数据列表
      cateList: [],
      //动态参数列表
      manyData: [],
      //静态属性列表
      onlyData: [],
      //上传图片的地址
      uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片请求头
      headersObj:{
          Authorization:window.sessionStorage.getItem('token')
      },
      //预览时的图片绝对路径
      previewPath:'',
      //预览对话框的显示与隐藏
      previewVisible:false,
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.cateList = res.data;
      console.log(this.cateList);
    },
    //级联选择器选中项发生变化时，触发这个函数
    handleChange() {
      //只允许选中三级商品分类
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //Tabs标签页切换  activeName即将进入的页 oldactiveName 即将离开的页
    beforeTabsleave(activeName, oldactiveName) {
      if (oldactiveName == "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //tab 被选中时触发
    async tabClicked() {
      //证明访问的是动态参数面板
      if (this.activeIndex == "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length == 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyData = res.data;
        //证明访问的是静态属性面板
      } else if (this.activeIndex == "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        this.onlyData = res.data;
      }
    },
    //处理图片预览效果
    handlePreview(file){
      this.previewPath=file.response.data.url
      console.log(file)
      this.previewVisible=true
    },
    //处理图片移除
    handleRemove(file){
      //1.找到要删除图片的临时路径
      const filePath=file.response.tmp_path
      //2.从pics数组中,找到这个图片对应的索引值
      const index= this.addForm.pics.findIndex(x=>{
        x.pic==filePath
      })
      //3.调用数组splice方法,移除此路径
      this.addForm.pics.splice(index,1)
      console.log(this.addForm)
    },
    //监听上传成功事件
    headeSuccess(response){
      console.log(response)
      //1.拼接得到一个图片的信息对象
      const picInfo={pic:response.data.tmp_path}
      //2.将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add(){
      //表单预校验
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
            return this.$message.error('请填写表单必要项！')
        } 
      //添加商品业务逻辑  用lodash进行深拷贝 
      //把对象原封不动的,拷贝出新的一份，放到新的空间，两者互不相干
      const form= _.cloneDeep(this.addForm)
      form.goods_cat=form.goods_cat.join(',')
      //处理动态参数
      this.manyData.forEach(item=>{
          const newIfno={attr_id:item.attr_id,
            attr_vals:item.attr_vals.join(' ')}
            this.addForm.attrs.push(newIfno)
      })
      //处理静态属性
      this.onlyData.forEach(item=>{
          const newIfno={attr_id:item.attr_id,
            attr_vals:item.attr_vals}
            this.addForm.attrs.push(newIfno)
      })
      form.attrs=this.addForm.attrs
      console.log(form)
      const {data:res}= await this.$http.post('goods',form)
      if(res.meta.status!==201){
          return this.$message.error('添加商品失败')
      }
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
      })
    }
  },
  computed: {
    //商品id
    cateId() {
      if (this.addForm.goods_cat.length == 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
  .btnAdd{
    margin-top: 15px;
  }
</style>

